
Why spend money for a classy basic necessity when you can get the same thing for free? Arguments like that have a few holes, which may explain why we buy luxury cars.
Going from point A to point B takes the same time whether in a lowly Kia or expensive Lexus. But spend money for a calculator on your Mac when it’s free in OS X? Why? Why not?
The coolest free calculator I’ve run into in many years is the calculator included with the iPhone. In portrait mode, you get.... (excerpted).
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Wayne said:
I prefer allRPNCalc for my iPhone, myself. I can’t use a non-RPN calculator, and allRPNCalc has: scientific, trig, stat, conversiobs (including currency)m financial, and programming (hex, binary, etc) modes. It feels very smooth in operation and I like it.
For fancy graphing, I’m also using TouchPlot and Grafly, each of which has it’s strengths.
So for a total of $20, I have a solid RPN calculator plus two graphing packages that can handle any graphing task (including 3D) I can think of.